1916091 has 12 divisors (see below), whose sum is σ = 2783560. Its totient is φ = 1270080.

The previous prime is 1916069. The next prime is 1916099. The reversal of 1916091 is 1906191.

It is not a de Polignac number, because 1916091 - 2⁶ = 1916027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1916099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1395 + ... + 2403.

2^1916091 is an apocalyptic number.

1916091 is a deficient number, since it is larger than the sum of its proper divisors (867469).

1916091 is a wasteful number, since it uses less digits than its factorization.

1916091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 1916091 is about 1384.2293885047. The cubic root of 1916091 is about 124.2048945149.

It can be divided in two parts, 19 and 16091, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 1916091 in words is "one million, nine hundred sixteen thousand, ninety-one".